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Rifles, Reloading, Optics, Equipment
Gunsmithing
7mm Chamber Neck Size
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<blockquote data-quote="J E Custom" data-source="post: 1497896" data-attributes="member: 2736"><p>What you want to do is push a bullet in one of your cases and measure</p><p>the outside diameter of the loaded neck. This will also give you a good neck wall thickness for your brass. if you are not going to turn the necks,</p><p>add a minimum of .003 thousandths to this dimension for the reamer neck diameter. I would recommend .004 thousandths (.002 on each side)to cover differences in neck wall thicknesses and spring back.</p><p></p><p>Most chambers have .004 to .006 loaded neck clearance and some dangerous game rifles have .008. If you make the chamber neck clearance .003, you should turn all necks to be sure that it will allow the bullet enough clearance or you may experience excessive pressures.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1497896, member: 2736"] What you want to do is push a bullet in one of your cases and measure the outside diameter of the loaded neck. This will also give you a good neck wall thickness for your brass. if you are not going to turn the necks, add a minimum of .003 thousandths to this dimension for the reamer neck diameter. I would recommend .004 thousandths (.002 on each side)to cover differences in neck wall thicknesses and spring back. Most chambers have .004 to .006 loaded neck clearance and some dangerous game rifles have .008. If you make the chamber neck clearance .003, you should turn all necks to be sure that it will allow the bullet enough clearance or you may experience excessive pressures. J E CUSTOM [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Gunsmithing
7mm Chamber Neck Size
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